Injector



(ModeL) F. G. DOUDS.

INJECTOR.

No. 317,750. Pateted May 12, 1885.

A ORNEYS.

NITED STATES PATENT Prion.

INJ ECTO R.

SPECIFICATION forming part of Letters Patent No. 317,750, dated May 12, 1885. Application filed October 21, 1884. (ModeL) To aZZ whom it may concern:

Be it known that I, FRANK O. DoUDs, of New Castle, in the county of Lawrence and State of Pennsylvania, have invented certain new and useful Improvements in Injectors; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, which forms a part of this specification, and which represents a longitudinal sectional view of my improved injector for steam-boilers.

My invention has relation to injectors for steam-boilers; and it consists in the improved construction and combination of parts of the same, as hereinafter more fully described and claimed.

In the accompanying drawing, the letter A indicates a T-joint or T- coupling having the steam-inlet Bat one side and having a screw-- threaded sleeve, 0, fitting in one end, in which threaded sleeve the threaded shank D of the valve E fits and turns. The valve E fits upon a valveseat, F, at the other end of the steam chamber of said T-joint, and the shank or stem of the valve has atransverse perforation, G, which opens into a longitudinal bore, H, in the stem and valve, which boreis continued into a lifting-tube, I, which extends beyond the valve into a sleeve, J. The bore of this sleeve is slightly tapering, and the end of the sleeve forms a tapering nozzle, K, which projects into a T joint, L, the lateral branch M of which is connected with the water-supply pipe, which is not shown in the drawing. The lifting-tube extends beyond the end of the nozzle into the funnel'shaped end N of a sleeve, 1?,which is fitted with one end into the T-joint, and the said sleeve has a tapering bore, Q, and has a tapering nozzle, R, at its end, which projects into another T-joint, S, into the lateral branch T of which the overflow-pipe U is fitted. One end of a sleeve,V, is fitted into the other end of the T-joint and opens into the boiler with its other end,

and has abore, WV, having the end facing the nozzle funnel-shaped, as shown at X.

The steam-pipe Y, which opens into the steam-chamber A, is provided with a valve, Z, and it will be seen that when the said valve is opened, letting in steam into the steamchamber, the steam will enter into the liftingpipe through the transverse perforation in the valve-stem D, when it will pass through the lifting-pipe past the water-inlet and out at the overflow-pipe, creating a vacuum in the T- joints and in the sleeves connecting the said joints. By creating this vacuum the water is raised in the supply-pipe,and when the valve E is opened the steam Will carry acontinuous stream of Water along with it into the boiler. By removing the T- joint A and simply fitting the steam-pipe upon the end of the sleeve J the injector will operate where raising the water is not necessary,and it will be seen that the water, which has passed out through the overflow-pipe, will also be raised.

It will be seen that my invention possesses points of superiority over other injectors in price, simplicity, and of the ease and cheapness with which it can be repaired. The injector is composed of the fewest pieces possible to accomplishthe desired result,and the main parts are common T-joints that are kept in stock by plumbers and gas-fitters, and they can be easily separated at any joint, and a defective or worn piece taken out and replaced without any outside covering or complicated arrangement to bother with.

I am aware that it is not new to make injectors to operate by means of a jet of steam from the boiler acting on a stream of water and forcing it into the boiler, and I do not claim such construction, broadly; but

What I do claim, and desire to secure by Letters Patent, is

In an injector for steam-boilers, the chamber consisting of the three interiorly screw-threaded T- coupling sections A, L, and S, hollow inside and of substantially the same shape and construction, in combination with the intermediate screw-threaded couplings, J and P, constructed to form the injector tubes, as shown, said T-sections being adapted to re ceive the said interior couplings provided with connecting-collars,substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

FRANK G. DOUDS.

Witnesses:

PERRY DOUDS, WM. F. DoUDs.

ICO 

